It seems pretty clear that at least some of the WHO leadership are being compensated directly or indirectly by the CCP. Short of a complete management purge and starting over I don't see how they will ever regain any credibility at this point.
Can you cite the information you have that makes this clear to you?
The WHO also is claiming that Taiwan is just a part of China and the WHO will not accept a free Taiwan. Seems overly political and specific for an "independent" health organization.
You know that the US also doesn't recognise Taiwan?
And in fact only a tiny handful of countries do?